Scanning device for phased array detection of fillet weld of connecting pipe

Abstract

The utility model provides a scanning device for phased array detection of a fillet weld of a connecting pipe, and the device comprises a centering assembly which comprises an adjusting part, a first abutting part and a second abutting part, and the adjusting part is used for driving the first abutting part and the second abutting part to stretch out and draw back synchronously; the first abutting piece and the second abutting piece are used for abutting against the inner wall of the connecting pipe, and the adjusting piece extends in the radial direction of the connecting pipe after abutting. The central rotating shaft is connected to the midpoint position of the adjusting piece in the length direction, and the axis of the central rotating shaft is perpendicular to the adjusting piece; and the clamping assembly is connected with the central rotating shaft and used for clamping a wedge block for phase control detection, and the clamping assembly can rotate around the axis of the central rotating shaft. According to the scanning device for phased array detection of the fillet weld of the connecting pipe, the adjusting piece drives the first abutting piece and the second abutting piece at the two ends to stretch out and draw back synchronously, it is ensured that the rotating center of the clamping assembly is the center of the connecting pipe, phased detection semi-automatic scanning of the fillet weld of the connecting pipe can be achieved, the scanning center is stable, and the detection precision can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of phased array detection, and in particular to a scanning device for phased array detection of pipe fillet welds. Background Art

[0002] When performing phased array inspections on fillet welds inserted between nozzles and cylinders in pressure vessels, the probe wedge assembly is typically handheld while scanning the inside of the vessel, moving the tip of the wedge along a drawn path. This manual movement creates an error between the tip of the wedge and the drawn path, and it also makes it difficult to consistently align the centerline of the wedge with the center of the nozzle. This results in incomplete test data and makes it difficult to meet the requirements for semi-automatic scanning of the inside of fillet welds during phased array inspections. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a scanning device for phased array detection of pipe fillet welds, which can determine the scanning center and improve the detection accuracy.

[0004] Based on the above objectives, the present application provides a scanning device for phased array inspection of pipe fillet welds, comprising:

[0005] A centering assembly includes an adjusting member, a first abutting member, and a second abutting member, wherein the first abutting member and the second abutting member are symmetrically connected to both ends of the adjusting member, and the adjusting member is used to drive the first abutting member and the second abutting member to synchronously extend and retract; the first abutting member and the second abutting member are used to abut against the inner wall of the connecting pipe, and after abutting, the adjusting member extends radially along the connecting pipe;

[0006] a central rotating shaft connected to the midpoint of the adjusting member in the longitudinal direction, wherein the axis of the central rotating shaft is perpendicular to the adjusting member;

[0007] The clamping assembly is connected to the central rotating shaft and is used to clamp the wedge used for phase control detection. The clamping assembly can rotate around the axis of the central rotating shaft.

[0008] In a preferred embodiment, the adjusting member includes an adjusting sleeve, the first abutting member includes a first adjusting bolt, the second abutting member includes a second adjusting bolt, and both ends of the adjusting sleeve are provided with a first threaded hole and a second threaded hole with opposite spiral directions. The first adjusting bolt is screwed to the first threaded hole, and the second adjusting bolt is screwed to the second threaded hole. When the adjusting sleeve rotates, it drives the first adjusting bolt and the second adjusting bolt to extend and retract synchronously.

[0009] In a preferred embodiment, the end surfaces of the first abutting member and the second abutting member that are away from each other are spherical arc surfaces, and the spherical arc surfaces are used to form point contact with the inner wall of the connecting pipe.

[0010] In a preferred embodiment, the scanning device further includes:

[0011] An adjusting component is connected between the clamping component and the central rotating shaft to adjust the distance between the clamping component and the central rotating shaft.

[0012] In a preferred embodiment, the adjustment assembly includes an adjustment screw sleeve and a third adjustment bolt threaded together. During the process of adjusting the distance between the clamping assembly and the central rotating shaft, the adjustment screw sleeve and / or the third adjustment bolt rotate relative to the clamping assembly around their own axis.

[0013] In a preferred embodiment, the adjustment assembly also includes a connecting head and a mounting bolt, the connecting head includes a first mounting hole and a second mounting hole arranged in parallel, the center shaft passes through the first mounting hole so that the connecting head is rotatably connected to the center shaft; the adjusting screw sleeve includes a third mounting hole, the axis of the third mounting hole is perpendicular to the axis of the adjusting screw sleeve, the mounting bolt passes through the second mounting hole and the third mounting hole, and the mounting bolt is threadedly connected to the second mounting hole and / or the third mounting hole.

[0014] In a preferred embodiment, the clamping assembly includes two parallel clamping arms and a connecting portion connected between the two clamping arms, and the third adjusting bolt passes through the connecting portion and is threadedly connected to the adjusting sleeve, wherein the third adjusting bolt and the connecting portion can rotate relative to each other.

[0015] In a preferred embodiment, the central shaft includes a coaxially arranged threaded section and an optical axis section, the adjusting member is provided with a third threaded hole, the threaded section is screwed to the third threaded hole, and the optical axis section is located in the first mounting hole.

[0016] In a preferred embodiment, the centering assembly further includes an anti-slip sleeve, and the anti-slip sleeve is respectively sleeved on the ends of the first abutting member and the second abutting member that are away from each other.

[0017] In a preferred embodiment, the first abutting member and the second abutting member both include an operating through hole, and the axis of the operating through hole is perpendicular to the extending direction of the adjusting member.

[0018] Compared with the prior art, the scanning device for phased array detection of pipe corner welds provided in the present application drives the first abutment and the second abutment at both ends to extend and retract synchronously through the adjusting member, keeps the first abutment and the second abutment symmetrically arranged and abuts against the inner wall of the pipe, so that the midpoint of the adjusting member is always aligned with the center of the pipe, and the central rotating shaft is vertically connected to the midpoint of the adjusting member. Then, the central rotating shaft is located on the central axis and extension line of the pipe, thereby ensuring that the rotation center of the clamping assembly is the center of the pipe, and semi-automatic scanning of the phased array detection of the pipe corner weld can be realized. The scanning center is stable, and the detection accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 Schematic diagram of the structure of a phased array detection device in the related art;

[0021] Figure 2 This is a schematic diagram of a scanning device for phased array inspection of pipe fillet welds in use according to an embodiment of the present application;

[0022] Figure 3 This is a schematic structural diagram of a scanning device for phased array inspection of pipe fillet welds in one embodiment of the present application;

[0023] Figure 4 This is a structural diagram of an adjusting member in one embodiment of the present application;

[0024] Figure 5 This is a structural diagram of the first abutting member in one embodiment of the present application;

[0025] Figure 6 This is a schematic top view of an adjusting screw sleeve in one embodiment of the present application;

[0026] Figure 7 This is a cross-sectional schematic diagram of an adjusting screw sleeve in one embodiment of the present application;

[0027] Figure 8 This is a schematic structural diagram of the third adjusting bolt in one embodiment of the present application;

[0028] Figure 9 This is a structural diagram of the central rotating shaft in one embodiment of the present application;

[0029] Figure 10 This is a schematic top view of a connector in one embodiment of the present application;

[0030] Figure 11 This is a structural diagram of a connector in one embodiment of the present application;

[0031] Figure 12 This is a schematic structural diagram of a clamping assembly in one embodiment of the present application;

[0032] Figure 13 This is a schematic top view of a clamping assembly in one embodiment of the present application;

[0033] Figure 14 Schematic diagram of the structure of the anti-slip sleeve in one embodiment of the present application.

[0034] Reference numerals

[0035] 1. Nozzle; 2. Cylinder; 3. Fillet weld; 4. Wedge;

[0036] 10. Centering assembly; 11. Adjusting member; 110. Adjusting sleeve; 111. First threaded hole; 112. Second threaded hole; 113. Third threaded hole; 12. First abutting member; 120. First adjusting bolt; 121. Spherical arc surface; 122. Operating through hole; 13. Second abutting member; 14. Anti-slip sleeve;

[0037] 20. Central rotating shaft; 21. Threaded section; 22. Optical axis section;

[0038] 30. Clamping assembly; 31. Clamping arm; 32. Connecting portion; 320. Connecting hole;

[0039] 40. Adjustment assembly; 41. Adjustment screw sleeve; 411. Third mounting hole; 42. Third adjustment bolt; 43. Connector; 431. First mounting hole; 432. Second mounting hole; 44. Mounting bolt. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0041] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] Phased Array Ultrasonic Testing (PAUT) is a non-destructive testing technology that uses a phased array probe to electronically scan, deflect, and focus the ultrasonic beam. A wedge is usually used to couple the ultrasonic energy so that the sound beam is transmitted from the probe to the material being tested. Figure 1 As shown, in the phased array detection device, the pipe 1 and the cylinder 2 are welded together in the form of a fillet weld 3. During the phased array detection of the pipe fillet weld, the probe is connected to the wedge 4, which is attached to the inner wall or outer wall of the cylinder 2 and can move along the corresponding cylinder surface so that the sound beam can be stably pointed in a certain direction.

[0043] Reference Figure 2 As shown, an embodiment of the present application discloses a scanning device for phased array detection of a fillet weld of a pipe, which is used to detect a fillet weld 3 between a pipe 1 and a cylinder 2. The scanning device includes a centering component 10, a central rotating shaft 20 and a clamping component 30.

[0044] The centering assembly 10 includes an adjusting member 11, a first abutment 12 and a second abutment 13. The first abutment 12 and the second abutment 13 are symmetrically connected at both ends of the adjusting member 11. The adjusting member 11 is used to drive the first abutment 12 and the second abutment 13 to extend and retract synchronously. The first abutment 12 and the second abutment 13 are used to abut against the inner wall of the pipe 1. After abutment, the adjusting member 11 extends radially along the pipe.

[0045] The central shaft 20 is connected to the midpoint of the adjusting member 11 in the longitudinal direction, and the axis of the central shaft 20 is perpendicular to the adjusting member 11. The clamping assembly 30 is connected to the central shaft 20 and is used to clamp the wedge used for phase control detection. The clamping assembly 30 can rotate around the axis of the central shaft 20.

[0046] The scanning device for phased array inspection of pipe fillet welds provided in the present application drives the first abutment 12 and the second abutment 13 at both ends through an adjustment member 11, causing them to extend and retract synchronously, maintaining the symmetry of the first abutment 12 and the second abutment 13 about the midpoint of the adjustment member 11, so that the first abutment 12 and the second abutment 13 abut against the inner wall of the pipe 1, so that the midpoint of the adjustment member 11 is always aligned with the center of the pipe 1. The central rotation shaft 20 is vertically connected to the midpoint of the adjustment member 11, so that the central rotation shaft 20 is located at the center of the pipe 1, and its function is to longitudinally extend the position of the central axis of the pipe 1, thereby ensuring that the rotation center of the clamping assembly 30 is the center of the pipe 1; the clamping assembly 30 drives the probe and wedge 4 for phased array inspection to rotate around the axis of the central rotation shaft 20, thereby realizing semi-automatic phased array inspection of pipe fillet welds, with a stable scanning center, which can improve inspection accuracy. At the same time, it can also be adjusted according to the different internal dimensions of the pipe 1 and determine the center of the pipe 1, meeting the requirements of semi-automatic scanning in phased array inspection of pipe fillet welds.

[0047] Reference Figure 4 、 Figure 5 As shown, in one embodiment, the adjusting member 11 includes an adjusting sleeve 110, the first abutting member 12 includes a first adjusting bolt 120, and the second abutting member 13 includes a second adjusting bolt. The structure of the second adjusting bolt is the same as that of the first adjusting bolt 120. The two ends of the adjusting sleeve 110 are respectively provided with a first threaded hole 111 and a second threaded hole 112. The spiral directions of the first threaded hole 111 and the second threaded hole 112 are opposite. The first adjusting bolt 120 is screwed to the first threaded hole 111, and the second adjusting bolt is screwed to the second threaded hole 112. When the adjusting sleeve 110 rotates, it drives the first adjusting bolt 120 and the second adjusting bolt to extend and retract synchronously. By threading the first and second adjusting bolts 120 and 13 at both ends of the adjusting sleeve 110, the distance can be adjusted according to the inner diameter of the hole of the pipe 1, and the centering assembly 10 can be tightened against the inner wall to secure it. The first and second adjusting bolts 120 and 13 are always symmetrical, ensuring that the middle position of the adjusting sleeve 110 is on the centerline of the pipe 1. This process can be called "fine tuning" of the centering assembly 10, which is adjusted within a preset range based on the inner diameter of the pipe 1. If the preset range is exceeded, another set or multiple sets of adjusting members 11, first abutting members 12, and second abutting members 13 of different lengths can be replaced to achieve "coarse tuning" of the centering assembly 10.

[0048] In other embodiments, the adjusting member 11 can be an adjusting gear, and accordingly, the first abutment 12 and the second abutment 13 can be racks engaged on both sides of the adjusting gear. When the adjusting gear rotates, the racks on both sides can be synchronously extended and retracted; the adjusting member 11 can also be a hydraulic cylinder or a pneumatic cylinder, and accordingly, the first abutment 12 and the second abutment 13 can be piston rods arranged on opposite sides of the hydraulic cylinder or the pneumatic cylinder. By controlling the hydraulic or air pressure, the synchronous extension and retraction of the piston rods on both sides can be achieved; in addition, the adjusting member 11, the first abutment 12, and the second abutment 13 can also adopt a connecting rod mechanism, such as a double crank slider mechanism, which drives the synchronous extension and retraction of the sliders on both sides by controlling the synchronous rotation of the two cranks.

[0049] Please continue to refer to Figure 5 As shown, in one embodiment, the end surfaces of the first abutting member 12 and the second abutting member 13 that are away from each other are spherical arc surfaces 121, which are used to form point contact with the inner wall of the pipe 1. The first abutting member 12 and the second abutting member 13 located at both ends of the adjusting member 11 abut against the inner wall of the pipe 1 through the spherical arc surfaces 121. The point contact has low friction, facilitates quick centering, and is more accurate.

[0050] Reference Figure 2 As shown, in one embodiment, the scanning device further includes an adjustment component 40 , which is connected between the clamping component 30 and the central rotation axis 20 to adjust the distance between the clamping component 30 and the central rotation axis 20 .

[0051] Please continue to refer to Figure 3 、 Figure 6 、 Figure 7 and Figure 8 As shown, in one embodiment, the adjustment assembly 40 includes an adjusting screw sleeve 41 and a third adjusting bolt 42 that are threaded together. During adjustment of the distance between the clamping assembly 30 and the central rotating shaft 20, the adjusting screw sleeve 41 and / or the third adjusting bolt 42 rotate relative to the clamping assembly 30 about their respective axes. Specifically, the screwed adjusting screw sleeve 41 and the third adjusting bolt 42 rotate and move relative to each other during the adjustment process. Since at least one of the adjusting screw sleeve 41 and the third adjusting bolt 42 can rotate relative to the clamping assembly 30, the rotational motion is not transmitted to the clamping assembly 30. The end surface of the third adjusting bolt 42 may also be a spherical arc surface.

[0052] Reference Figure 3 、 Figure 10 、 Figure 11As shown, in one embodiment, the adjustment assembly 40 also includes a connecting head 43 and a mounting bolt 44, the connecting head 43 includes a first mounting hole 431 and a second mounting hole 432 arranged in parallel, the center shaft 20 passes through the first mounting hole 431 so that the connecting head 43 is rotatably connected to the center shaft 20; the adjusting screw sleeve 41 includes a third mounting hole 411, the axis of the third mounting hole 411 is perpendicular to the axis of the adjusting screw sleeve 41, the mounting bolt 44 passes through the second mounting hole 432 and the third mounting hole 411, and the mounting bolt 44 is screwed to the second mounting hole 432 and / or the third mounting hole 411 to fix the connecting head 43 to the adjusting screw sleeve 41. Among them, the distance between the wedge 4 and the center of the connecting pipe 1 can be adjusted by adjusting the component 40. The distance between the probe and the wedge 4 and the fillet weld can be adjusted within a certain range according to the inner diameter of the connecting pipe 1 and the offset of the probe wedge. This is called "fine-tuning" of the adjustment component 40. If it exceeds a certain range, another set of adjusting screw sleeves 41 and third adjusting bolts 42 of different lengths can be replaced for "coarse adjustment". In this process, adjusting screw sleeves 41 of different lengths can be freely combined with third adjusting bolts 42 of different lengths to obtain the required offset distance.

[0053] In other embodiments, the adjustment component 40 can be a slider guide rail assembly, which adjusts the distance by sliding a slider on the guide rail; the adjustment component 40 can also be a telescopic rod assembly, which adjusts the length by an internal telescopic rod; the adjustment component 40 can also be a hydraulic cylinder or a pneumatic cylinder, which controls the hydraulic or pneumatic pressure to push the piston rod to extend and retract, thereby achieving distance adjustment.

[0054] Reference Figure 12 、 Figure 13 As shown, in one embodiment, the clamping assembly 30 includes two parallel clamping arms 31 and a connecting portion 32 connected between the two clamping arms 31. The connecting portion 32 includes a through-hole 320. A third adjustment bolt 42 passes through the connecting hole 320 and is threadedly engaged with the adjustment screw sleeve 41. The third adjustment bolt 42 and the connecting portion 32 are relatively rotatable. Furthermore, the clamping arms 31 are tilted, specifically, gradually approaching the side of the pipe 1 in a direction away from the central rotation axis 20. The clamping assembly 30 utilizes a yoke-like structure to connect the adjustment assembly 40 to the wedge 4. When the third adjustment bolt 42 is rotated to adjust the distance, the connecting portion 32 moves with the third adjustment bolt 42 without rotating.

[0055] Reference Figure 9As shown, in one embodiment, the central shaft 20 includes a coaxially arranged threaded segment 21 and an optical axis segment 22. A third threaded hole 113 is provided in the middle of the adjusting member 11. The threaded segment 21 is threadedly engaged with the third threaded hole 113, and the optical axis segment 22 is located in the first mounting hole 431. The central shaft 20 is fixed to the adjusting member 11 via the threaded segment 21, and the connector 43 is rotatably mounted to the optical axis segment 22 via the first mounting hole 431, allowing the clamping assembly 30 to rotate about the central shaft 20 via the adjustment assembly 40.

[0056] Reference Figure 14 As shown, in one embodiment, the centering assembly 10 further includes an anti-slip sleeve 14, which is respectively mounted on the ends of the first abutting member 12 and the second abutting member 13 that are spaced apart from each other. The ends of the first abutting member 12 and the second abutting member 13 that are spaced apart from each other constitute the abutting ends. By adding the anti-slip sleeve 14 to the abutting ends of the centering assembly 10, friction is increased, cushioning is provided, and stability is improved. Optionally, the anti-slip sleeve 14 is a silicone sleeve.

[0057] Reference Figure 5 As shown, the first abutting member 12 and the second abutting member 13 each include an operating through hole 122, the axis of which is perpendicular to the extending direction of the adjusting member 11. Optionally, the first abutting member 12 and the second abutting member 13 each include a pair of operating through holes 122 that are perpendicular to each other.

[0058] The scanning device of the present application is located inside the cylinder 2 when in use, and the wedge block 4 is in contact with the inner wall of the cylinder 2 . For a pipe 1 with a known diameter, the anti-slip sleeve 14 can be put on one end of the first adjusting bolt 120 and the second adjusting bolt, and then the first adjusting bolt 120 and the second adjusting bolt can be screwed into the adjusting sleeve 110 to realize the assembly of the centering assembly 10, ensuring that the first adjusting bolt 120 and the second adjusting bolt are screwed in symmetrically at both ends of the adjusting sleeve 110, and the total length of the centering assembly 10 is 5-10mm smaller than the diameter of the pipe 1. The adjustment process can be done manually, or a tool can be inserted into the operating through-holes 122 at the ends of the first adjusting bolt 120 and the second adjusting bolt for rotational adjustment; the centering assembly 10 is placed into the interior of the pipe 1 again and kept horizontal. While stopping the first adjusting bolt 120 and the second adjusting bolt from rotating, the adjusting sleeve 110 is rotated so that the first adjusting bolt 120 and the second adjusting bolt extend outward from the adjusting sleeve 110, thereby abutting and tightening the inner wall of the pipe 1, and the centering assembly 10 is parallel to the end face of the pipe 1, and the centering assembly 10 is kept in the center of the pipe 1 in the middle position in the length direction.

[0059] The central shaft 20 passes through the connector 43 and is screwed into the third threaded hole 113 in the middle of the adjusting sleeve 110. The central shaft 20 is perpendicular to the adjusting member 11 and is located on the central axis of the pipe 1 to determine the center for subsequent scanning.

[0060] The wedge 4 is clamped by a clamping assembly 30, which is connected to the central shaft 20 via an adjustment assembly 40. The clamping assembly 30 and the adjustment assembly 40 can rotate together about the central shaft 20. During rotation, the centerline of the clamping assembly 30 always points toward the center of the central shaft 20. The distance between the wedge 4 and the center of the pipe 1 is the scanning distance, which can be controlled to a constant value in this application. Furthermore, the distance between the wedge 4 and the fillet weld 3 can be adjusted by adjusting the adjustment screw 41 and the third adjustment bolt 42 in the adjustment assembly 40 to obtain a suitable offset distance.

[0061] In general, the scanning device for phased array inspection of pipe fillet welds of the present application can be adjusted according to the different inner diameter sizes of the pipe 1 and find the scanning center as quickly as possible. It can also adjust the distance position according to the offset distance requirements of the wedge block 4, etc., to meet the requirements of semi-automatic scanning of the inside of the phased array inspection of pipe fillet welds.

[0062] It should be noted that the above description is limited to some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in a different order than that described in the above embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results.

[0063] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of the above embodiments of the present application, which are not provided in detail for the sake of simplicity.

[0064] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A phased array scanning device for detecting fillet welds of pipes, used to detect fillet welds between pipes and cylinders, characterized in that: include: A centering assembly includes an adjusting member, a first abutting member, and a second abutting member, wherein the first abutting member and the second abutting member are symmetrically connected to both ends of the adjusting member, and the adjusting member is used to drive the first abutting member and the second abutting member to synchronously extend and retract; the first abutting member and the second abutting member are used to abut against the inner wall of the connecting pipe, and after abutting, the adjusting member extends radially along the connecting pipe; a central rotating shaft connected to the midpoint of the adjusting member in the longitudinal direction, wherein the axis of the central rotating shaft is perpendicular to the adjusting member; The clamping assembly is connected to the central rotating shaft and is used to clamp the wedge used for phase control detection. The clamping assembly can rotate around the axis of the central rotating shaft.

2. The scanning device for phased array inspection of pipe fillet welds according to claim 1, characterized in that: The adjusting member includes an adjusting sleeve, the first abutting member includes a first adjusting bolt, the second abutting member includes a second adjusting bolt, and both ends of the adjusting sleeve are provided with a first threaded hole and a second threaded hole with opposite spiral directions. The first adjusting bolt is screwed into the first threaded hole, and the second adjusting bolt is screwed into the second threaded hole. When the adjusting sleeve rotates, it drives the first adjusting bolt and the second adjusting bolt to extend and retract synchronously.

3. The scanning device for phased array inspection of pipe fillet welds according to claim 1, characterized in that: The end surfaces of the first abutting member and the second abutting member that are away from each other are spherical arc surfaces, and the spherical arc surfaces are used to form point contact with the inner wall of the connecting pipe.

4. The scanning device for phased array inspection of pipe fillet welds according to claim 1, characterized in that: The scanning device also includes: An adjusting component is connected between the clamping component and the central rotating shaft to adjust the distance between the clamping component and the central rotating shaft.

5. The scanning device for phased array inspection of pipe fillet welds according to claim 4, characterized in that: The adjustment assembly includes an adjustment screw sleeve and a third adjustment bolt screwed together. During the process of adjusting the distance between the clamping assembly and the central rotating shaft, the adjustment screw sleeve and / or the third adjustment bolt rotate relative to the clamping assembly around their own axis.

6. The scanning device for phased array inspection of pipe fillet welds according to claim 5, characterized in that: The adjustment assembly also includes a connecting head and a mounting bolt, the connecting head includes a first mounting hole and a second mounting hole arranged in parallel, the central rotating shaft passes through the first mounting hole so that the connecting head is rotatably connected to the central rotating shaft; the adjusting screw sleeve includes a third mounting hole, the axis of the third mounting hole is perpendicular to the axis of the adjusting screw sleeve, the mounting bolt passes through the second mounting hole and the third mounting hole, and the mounting bolt is threadedly connected to the second mounting hole and / or the third mounting hole.

7. The scanning device for phased array inspection of pipe fillet welds according to claim 5, characterized in that: The clamping assembly includes two parallel clamping arms and a connecting portion connected between the two clamping arms. The third adjusting bolt passes through the connecting portion and is threadedly connected to the adjusting nut. The third adjusting bolt and the connecting portion are relatively rotatable.

8. The scanning device for phased array inspection of pipe fillet welds according to claim 6, characterized in that: The central rotating shaft includes a coaxially arranged threaded section and an optical axis section. The adjusting member is provided with a third threaded hole. The threaded section is screwed to the third threaded hole. The optical axis section is located in the first mounting hole.

9. The scanning device for phased array inspection of pipe fillet welds according to claim 1, characterized in that: The centering assembly further includes an anti-slip sleeve, which is respectively sleeved on the ends of the first abutting member and the second abutting member that are away from each other.

10. The scanning device for phased array inspection of pipe fillet welds according to claim 1, characterized in that: The first abutting member and the second abutting member both include an operating through hole, and the axis of the operating through hole is perpendicular to the extending direction of the adjusting member.

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